EP1261798B1 - Gesteinsbohrer - Google Patents

Gesteinsbohrer Download PDF

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Publication number
EP1261798B1
EP1261798B1 EP01913716A EP01913716A EP1261798B1 EP 1261798 B1 EP1261798 B1 EP 1261798B1 EP 01913716 A EP01913716 A EP 01913716A EP 01913716 A EP01913716 A EP 01913716A EP 1261798 B1 EP1261798 B1 EP 1261798B1
Authority
EP
European Patent Office
Prior art keywords
drill head
carbide insert
drill
conveying
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01913716A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1261798A2 (de
Inventor
Wolfgang Peetz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1261798A2 publication Critical patent/EP1261798A2/de
Application granted granted Critical
Publication of EP1261798B1 publication Critical patent/EP1261798B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts

Definitions

  • the invention relates to a rock drill according to the preamble of patent claim 1.
  • a rock drill for hand-held hammer, hammer and rotary drilling machines which has a drill head with an adjoining spiral-shaped helix and a adjoining clamping shaft, wherein the drill head has a hard metal insert, which is in one direction extends transversely over the drill head and is embedded in a receiving slot in the drill head, wherein the drill head in the field of embedding the hard metal insert has a support of the hard metal paragraph and wherein the outlet of the conveyor coil is guided into the support region of the hard metal insert.
  • a well-known rock drill consists of a helical shank and a drill head, in which a side view, itself is used over the entire drill nominal diameter extending roof-shaped carbide cutting element (DE 197 34 094 A1).
  • the drill head has an axially extending, slot-shaped recess into which the carbide insert is inserted and soldered.
  • the carbide cutting plate In order to achieve sufficient stability of the drilling tool, the carbide cutting plate must have a certain minimum thickness or minimum thickness, which requires a correspondingly wide receiving slot for the carbide insert. However, such, extending over the entire diameter receiving slot for the carbide insert weakens the wall thickness available on the drill head to support the carbide insert.
  • Powerful rock drills require conveying helixes with high volumes of the helical grooves in order to enable the removal of the largest possible amount of drilling dust.
  • a high groove volume is achieved by a large groove depth, but this automatically leads to a lower core thickness or core thickness of the remaining core cross section of the conveyor spiral.
  • the conveyor helix pitch a measured towards the drill longitudinal axis is driven to zero in the region of the drill head, that is, the profile grinding wheel used to produce the helical feed groove is moved out almost axially parallel to the drill head in the end region of the conveying helix, without causing in this area, the drilling tool still rotates.
  • the conveyor coil is therefore not continued to the front end of the spiral shaft, but as a kind of flat; formed chisel-shaped tip.
  • the fact that the conveyor coil is not continued to the front of the drill head, widened in this area, the spine of the conveyor spiral, so that material for receiving and embedding the carbide insert is formed. This is shown in Figure 2a, 2b respectively in a side view of the prior art.
  • Such a production thus leads to a flat, chisel-shaped drill head, in which a corresponding longitudinal slot for receiving the carbide cutting plate can be introduced.
  • the transition between carbide cutting plate and conveyor spiral can be ground, as shown with the surface portions 25, 26 in the above-mentioned figures 4, 5, 7 of DE 197 34 094.
  • the invention has for its object to provide a drilling tool, which does not have the disadvantages mentioned above and in which, especially shortly after drilling a good guidance of the drilling tool in the borehole is achieved in the drill head area. Another advantage is a particularly robust embedding of the carbide insert.
  • the invention is based on the core idea to continue the delivery spiral as far as possible to the drill tip, in order to achieve optimum conveying and guiding properties of the drilling tool in the drill head area.
  • carbide insert which is preferably designed as a carbide insert is guaranteed.
  • the conveyor spiral is therefore guided to the area of the surface portions for lateral support of the carbide cutting plate.
  • no change in pitch with respect to the pitch of the conveyor spiral is performed, that is, the pitch angle is not brought to zero as in the prior art.
  • the increase in the core thickness of the conveying groove in the region of the drill head can be continuous or discontinuous. Usually, this is done continuously by a uniform retraction of the tool.
  • the increase in the core thickness of the conveying groove for forming a sufficient support of the carbide cutting plate is preferably carried out such that a double-sided embedding, that is, both sides support the carbide insert takes place.
  • the support is particularly important in particular behind the free surface of the insert lying area.
  • spiral helical one or more continuous spiral wherein circumferential main webs and peripheral side webs are formed, which are preferably formed according to the earlier application DE 197 53 731 A1 of the applicant. Reference is expressly made to this.
  • access to each Maurusnut as well as the Haupttexnuten achieved by an extremely slender drill head which is achieved by a straight, paraxial outlet of the spiral conveyor spiral in the region of the drill head.
  • Even with such a special conveyor spiral with the associated advantageous properties the teaching of the invention can be advantageously realized. Further training for this purpose are given in the dependent claims.
  • the conveying edges of the main and / or secondary webs for the formation of Bohrmchevrag lake preferably an approximately rectangular course to the drill longitudinal axis.
  • the secondary web of the secondary conveyor spiral can be formed with a pointed back.
  • the rock drill 1 shown in Figures 1a, 1b in each case in side view consists of a drill head 2, an adjoining helical shaft with two-flight spiral-shaped conveyor spiral 3 and an adjoining clamping shaft 4 for insertion into a drive machine.
  • the clamping shaft 4 has receiving means 5 for use in a hammer drill (SDS plus shaft).
  • the helical shank or the conveying helix 3 is in principle of identical design, as is described in principle in the document DE 197 35 731 A1 of the applicant and in particular in the local figures 1 and 2. This is hereby incorporated by reference.
  • the conveyor coil 3 is designed as a double-flighted conveyor spiral, wherein between two spirally encircling main webs 6, 7 each have a main Abschreibnut 10, 11 is formed over a height section h 1 .
  • height sections h 1 are shown only symbolically in FIG. 1 a in order to represent the region of such a main discharge groove 10, 11.
  • the main webs 6, 7 of the conveyor coil 3 have an outer diameter d 1 and continue to have z.
  • B. a rectangular or semi-trapezoidal cross section with lying perpendicular to the drill longitudinal axis 12 conveying edges 13, 14.
  • each main Abssel 10, 11 with their limiting main webs 6, 7 are each a likewise spirally encircling secondary web 8, 9 with a smaller outer diameter d.
  • the secondary web 8, 9 is formed as a projection within the main discharge groove 10, 11.
  • the main web 6 thus forms the lateral, approximately radially extending conveying edge 13 for the Bohrmehl to be funded, the Main ridge 7 the corresponding conveying edge 14 for corresponding drilling dust.
  • the secondary web 8 also has an approximately perpendicular to the drill longitudinal axis conveying edge 15 for drilling dust and the further secondary web 9 a corresponding conveyor edge 16 for corresponding cuttings.
  • the main Abgaunut 10 is divided into two Abbignuten 17, 18 with the conveyor edges 13, 15 and the other main Abbignut 11 in two further Abbigen 19, 20 with the conveyor edges 14, 16. It is therefore a two-speed conveyor coil 3 with the main webs 6, 7 with each embedded in the Bohrmehlabschreibnut 10, 11 Maufactstegen 8, 9.
  • the conveyor coil 3 has in addition to the largely radially extending conveyor edges 13 to 16 axially parallel portions in the groove bottom, with Reference numerals 21 are indicated.
  • the web width of the main webs 6, 7 is s 1 .
  • the side webs 8, 9 are formed so that they almost run to the outside on its outer circumference.
  • the diameter ratio d 1 to d 2 is approximately d 2 ⁇ 0.7 to 0.9 xd 1 .
  • the conveyor coil 3 ends approximately at a distance a below the drill leading edge 25'.
  • the drill leading edge 25 ' is the front part of the drill without a carbide insert 22' inserted. If the delivery helix were to be allowed to run out to the front edge of the drill, the groove would extend to this front area, so that only narrow conveyor spiral webs would be present.
  • a carbide cutting plate can not be used so that it is supported supported on both sides in the drill head.
  • the conveyor spiral groove ends at a distance a in front of the drill leading edge, so that the widened spine 26 'shown in FIG. 2b results (width b 1 ), which serves to support the hard metal cutting plate on both sides.
  • the distance a in which the conveyor coil ends is about the same size as the nominal diameter D, that is, the width of the carbide cutting plate 22 'is selected. This is done by straightforward retraction of the grinding wheel, without the tool turning even further in this area.
  • the pitch angle ⁇ thus becomes zero degrees.
  • this measure provides a sufficient Abstützquerrough for the carbide insert.
  • the drill is made extremely slim in this area, which at least deteriorates the leadership properties of the drilling tool during tapping until the actual conveyor coil engages ,
  • the groove depth is gradually reduced from a height distance h 2 before the drill leading edge 25, so that the main webs 6, 7 gradually widen, as shown by reference numeral 26 as widening spine web ,
  • a correspondingly wide back rib 26, 27 can adjust, in which at least one corresponding receiving slot 23 for receiving a hard metal insert 22 and preferably a carbide cutting plate 22 can be introduced.
  • the height section h 2 corresponds approximately to the pitch h 1 of the main discharge grooves 10, 11.
  • the resulting broadening of the back webs 26, 27 is also shown in Figure 1c.
  • a drill head can be easily use a carbide insert 22 in conventional design.
  • the carbide cutting plate 22 has a diameter D (nominal diameter).
  • the height of the insert is indicated by h 3 .
  • the roof-shaped carbide cutting plate 22 has two cutting edges 29, 30, pointing in the direction of rotation clamping surfaces 31, with frontal, lying on a conical surface cutting edges 32 and with a rear free surface 33, in the embodiment in two Open space sections 33 ', 33' 'are divided.
  • an enlargement of the spine widths is achieved by the gradual increase in the core thickness at the outlet of the conveyor coil in the drill head area, so that the receiving slot 23 for the carbide insert can be easily introduced into the drill head, although the Conveyor spiral up to the front surface portions 34, 35 extends, such as are made by grinding the drill head.
  • the conveyor coil is guided into the region of the drill head, which is defined by the depth t 1 for producing the receiving slot 23. That is, the conveyor coil 3 is far enough continued in the drill head 2 that it extends to above the slot bottom 24. This extension can continue, for example, up to half the depth t 1 of the receiving slot 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Steroid Compounds (AREA)
EP01913716A 2000-03-09 2001-02-24 Gesteinsbohrer Expired - Lifetime EP1261798B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10011108A DE10011108A1 (de) 2000-03-09 2000-03-09 Gesteinsbohrer
DE10011108 2000-03-09
PCT/DE2001/000720 WO2001066899A2 (de) 2000-03-09 2001-02-24 Gesteinsbohrer

Publications (2)

Publication Number Publication Date
EP1261798A2 EP1261798A2 (de) 2002-12-04
EP1261798B1 true EP1261798B1 (de) 2005-09-21

Family

ID=7633849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01913716A Expired - Lifetime EP1261798B1 (de) 2000-03-09 2001-02-24 Gesteinsbohrer

Country Status (6)

Country Link
US (1) US6742610B2 (da)
EP (1) EP1261798B1 (da)
AT (1) ATE305078T1 (da)
DE (2) DE10011108A1 (da)
DK (1) DK1261798T3 (da)
WO (1) WO2001066899A2 (da)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808462B1 (fr) * 2000-05-05 2002-09-20 Diager Foret de percage
DE10208631A1 (de) * 2002-02-28 2003-09-11 Hawera Probst Gmbh Bohrwerkzeug
DE10241054A1 (de) * 2002-09-05 2004-03-18 Robert Bosch Gmbh Werkzeug und Werkzeughalter für eine Handwerkzeugmaschine
GB2393681A (en) * 2002-10-03 2004-04-07 Black & Decker Inc Masonry drilling tool
CN101715194A (zh) * 2002-10-18 2010-05-26 卡耐特无线有限公司 扩展有执照无线通信系统覆盖区域的装置与方法
US20080166194A1 (en) * 2007-01-09 2008-07-10 Durfee Laverne R Drill bit
US20100003094A1 (en) * 2007-01-09 2010-01-07 Irwin Industrial Tool Company Drill bit
US20090148250A1 (en) * 2007-12-05 2009-06-11 Wayne Chappell Drill Bit
US8070397B2 (en) 2008-02-19 2011-12-06 Irwin Industrial Tool Company Self feed bit
DE102008022945A1 (de) * 2008-05-09 2009-12-03 Irwin Industrial Tools Gmbh Bohrwerkzeug, insbesondere Spiralbohrer
US7861807B2 (en) * 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
US20100307640A1 (en) * 2009-06-03 2010-12-09 Durfee La Verne R Cutting edge and cutting tool
DE102011016686A1 (de) * 2011-04-11 2012-10-11 Illinois Tool Works Inc. Gesteinsbohrer
CN102814536A (zh) * 2012-08-13 2012-12-12 泰兴市信达克刀具有限公司 钢件用镶片式硬质合金钻头及加工方法
DE102013106614A1 (de) * 2013-06-25 2015-01-08 Heller Tools Gmbh Gesteinsbohrer
DE102016221515A1 (de) 2015-11-09 2017-05-11 Robert Bosch Gmbh Bohrwerkzeug
CN110242217B (zh) * 2019-06-10 2020-12-11 日照亿铭科技服务有限公司 一种钻地钻头
TWI767349B (zh) * 2020-10-06 2022-06-11 龍華科技大學 一種數位多模式控制之全橋相移轉換器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635856A (en) * 1949-05-27 1953-04-21 Diamond Expansion Bolt Co Masonry drill
US4143723A (en) * 1977-10-04 1979-03-13 Schmotzer Norman H Carbide tipped drill bit for boring holes in concrete and steel
DE3317989A1 (de) * 1983-05-18 1984-11-22 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrwerkzeug
DK152555C (da) 1985-04-01 1988-08-01 Joran Bor A S Stenbor, isaer til hammerboremaskiner
DE3875710D1 (de) 1987-12-01 1992-12-10 Hawera Probst Kg Hartmetall Gesteinsbohrer.
DE3834675A1 (de) * 1988-10-12 1990-04-19 Hawera Probst Kg Hartmetall Bohrwerkzeug
DE4028261A1 (de) * 1990-08-06 1992-02-13 Fischer Artur Werke Gmbh Bohrer zur herstellung von zylindrischen bohrloechern
US5918105A (en) 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
TW299385B (en) * 1994-12-12 1997-03-01 Black & Decker Inc Cutting tools for drilling concrete, aggregate, masonry or the like materials
DE19545647A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
JPH09277108A (ja) * 1996-02-14 1997-10-28 Sumitomo Electric Ind Ltd ドリル
DE19734094A1 (de) 1996-11-11 1998-05-14 Hawera Probst Gmbh Gesteinsbohrer
DE19707115A1 (de) * 1997-02-22 1998-08-27 Hilti Ag Bohr- und/oder Meisselwerkzeug
DE19753731A1 (de) 1997-12-04 1999-06-10 Hawera Probst Gmbh Gesteinsbohrwerkzeug

Also Published As

Publication number Publication date
US6742610B2 (en) 2004-06-01
US20030019667A1 (en) 2003-01-30
EP1261798A2 (de) 2002-12-04
ATE305078T1 (de) 2005-10-15
WO2001066899A2 (de) 2001-09-13
DE10011108A1 (de) 2001-09-13
DE50107487D1 (de) 2005-10-27
WO2001066899A3 (de) 2001-12-06
DK1261798T3 (da) 2006-01-23

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